000 00270nam a22001217a 4500
020 _a067315856X
082 _a339/02
100 _aPaul R. Gregory and Roy J. Ruffin
_989748
245 _aPrinciples of Macroeconomics
260 _c1978
300 _a416p
942 _cBK
999 _c144212
_d144212